4. Charts Exercise :
Lesson-1 Lesson-2 Lesson-3 Lesson-4
Lesson-5 Lesson-6 Lesson-7 Lesson-7a
Lesson-7b Lesson-7c Lesson-8 Lesson-9
Lesson-10 Lesson-11 Lesson-12 Lesson-13
Lesson-14 Lesson-15 Lesson-16 Lesson-17
Lesson-18 Lesson-19 Lesson-20 Lesson-21
Lesson-22 Lesson-23 Lesson-24 Lesson-25
Lesson-26 Lesson-27 Lesson-28 Lesson-29
Passive Voice :
Lesson-31 Lesson-32 Lesson-33 Lesson-34